Transmission Aux Oil cooler recommendation? - Jeep Patriot Forums
Engine and Drivetrain Engines, transfer cases, transmissions and axles

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post #1 of 18 (permalink) Old 06-05-2019, 12:55 AM Thread Starter
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Transmission Aux Oil cooler recommendation?

Any recommendations for an aux. oil cooler for the 2012 Patriot 4wd with the auto-stick transmission?

I've looked at this one - https://www.ebay.com/itm/Mopar-2008-...ry!76706!US!-1

Any better ones out there? I didn't find what I wanted on here so I thought I'd ask.
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post #2 of 18 (permalink) Old 06-05-2019, 11:57 AM

 
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Patriots already come with a transmission cooler, but there are differences between models:
https://www.jeeppatriot.com/forum/15...-you-have.html

If you want you can install an aftermarket cooler in addition to the factory cooler. Here's one some people have used:
https://www.amazon.com/Hayden-Automo.../dp/B000C3DDKO
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post #3 of 18 (permalink) Old 06-05-2019, 12:06 PM Thread Starter
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Thanks for the reply, I'm trying to see if cooling the fluid will reduce the whine.
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post #4 of 18 (permalink) Old 06-05-2019, 12:12 PM

 
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It might if you're still having problems with the trans overheating and you're getting good flow through the cooler you already have.
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post #5 of 18 (permalink) Old 06-05-2019, 01:04 PM
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Also make sure you're telling the difference between an engine oil cooler and a transmission fluid cooler, just in case. If you go into the dealer or an independent shop and ask for an oil cooler, they'll install just that....an auxiliary engine oil cooler, not an auxiliary transmission fluid cooler.
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post #6 of 18 (permalink) Old 06-05-2019, 08:44 PM Thread Starter
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Quote:
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It might if you're still having problems with the trans overheating and you're getting good flow through the cooler you already have.
No overheating issues or limp mode. looking to decrease trans temp via another cooler.
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post #7 of 18 (permalink) Old 06-05-2019, 08:49 PM Thread Starter
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Quote:
Originally Posted by RossoRacer View Post
Also make sure you're telling the difference between an engine oil cooler and a transmission fluid cooler, just in case. If you go into the dealer or an independent shop and ask for an oil cooler, they'll install just that....an auxiliary engine oil cooler, not an auxiliary transmission fluid cooler.
Thanks for that and making sure the dealer and I are on the same page is paramount. It cuts out the "but you asked for an oil cooler" issue.

Good catch for sure.
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post #8 of 18 (permalink) Old 06-05-2019, 09:09 PM
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Did you rule out the trans cooler thermostat?

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post #9 of 18 (permalink) Old 06-05-2019, 11:08 PM Thread Starter
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Did you rule out the trans cooler thermostat?
For the whine? I'm not having any overheating issues or failsafe issues.
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post #10 of 18 (permalink) Old 06-06-2019, 09:33 AM

 
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Originally Posted by cprems View Post
For the whine? I'm not having any overheating issues or failsafe issues.
If it's not getting too hot, adding another cooler won't likely reduce the whine.
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post #11 of 18 (permalink) Old 06-09-2019, 07:48 PM
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Is it CVT or 6 speed auto?

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Last edited by DJMurphy; 06-09-2019 at 07:58 PM.
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post #12 of 18 (permalink) Old 06-09-2019, 08:10 PM

 
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It's a 2012 CVT
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post #13 of 18 (permalink) Old 06-11-2019, 11:54 PM
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Our CVT uses a vane pump for the hydraulics. They are commonly used in industry, and most cases of pump whine that I've come across is usually caused by a restriction or an air leak on the suction side. There's also a possibility of the hydraulic fluid foaming if the temps are high, which can also cause whine due to entrained air. If the vanes are already damaged you will also get pump noise.

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post #14 of 18 (permalink) Old 06-12-2019, 10:54 AM

 
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Quote:
Originally Posted by DJMurphy View Post
Our CVT uses a vane pump for the hydraulics. They are commonly used in industry, and most cases of pump whine that I've come across is usually caused by a restriction or an air leak on the suction side...
So in the case of restriction on the suction side, would adding another trans cooler help?

If not, presuming the cooler filter is new, what would you look for ? Problem with the bypass valve? Damaged/bent cooler lines? Clogged oil-on-water exchanger (soup can)?
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post #15 of 18 (permalink) Old 06-13-2019, 08:08 PM
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A trans cooler wonít help if there is suction side restriction or leak because itís the cavitation thatís causing the whine. Weíre assuming itís actual pump whine and not something else like an input bearing, pump bearing or such.

If it was my Jeep Iíd get an infrared thermometer and start taking temps at pan, cooler input/output lines and soup can coolant lines to rule out overheating. A cheap OBD interface and the Torque app will display trans temp.

Other things I would check is proper pan filter fitment, especially the filter oring and valve body interfaces and verify the fluid levels. Soup can heat exchanger can be removed, inspected and flushed, then reinstalled with a new coolant filter.

Ultimately if no progress is made you live with it or go down the rabbit hole and get an expert opinion from a reputable transmission shop and see where that leads and at what cost.

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